Provides the ability to retrieve all Resource Groups

main.go

package main

import (
	"context"
	"log"
	"os"

	"github.com/Azure/azure-sdk-for-go/services/resources/mgmt/2018-05-01/resources"
	"github.com/Azure/go-autorest/autorest"
	"github.com/Azure/go-autorest/autorest/azure"
	"github.com/Azure/go-autorest/autorest/azure/auth"
)

const ()

var (
	authorizer     autorest.Authorizer
	ctx            = context.Background()
	err            error
	subscriptionID = getSubscriptionID()
)

func main() {
	for groups, err := getResourceGroups(subscriptionID); groups.NotDone(); err = groups.Next() {
		if err != nil {
			log.Fatalf("Error: %v", err)
		}
		groupName := *groups.Value().Name
		log.Printf("Resource Group: %v", groupName)
	}
}

func init() {}

func getResourceGroups(subscriptionID string) (resources.GroupListResultIterator, error) {
	c := resources.NewGroupsClient(subscriptionID)
	a, err := auth.NewAuthorizerFromFile(azure.PublicCloud.ResourceManagerEndpoint)
	if err != nil {
		log.Fatalf("Error: %v", err)
	}
	c.Authorizer = a
	return c.ListComplete(ctx, "", nil)
}

func getSubscriptionID() string {
	id := os.Getenv("AZURE_SUBSCRIPTION_ID")
	if id == "" {
		log.Fatalf("Error: environment variable AZURE_SUBSCRIPTION_ID is not set")
	}
	return id
}